Hisense LHD24N10NAM, LHD32N10NAM, LTDN48K20DAM Service Manual
LCD Television
Service Manual
Chassis： MSD6308
Product:
N10 series:
LHD24N10NAM、LHD32N10NAM
K160 series: LHD32K160NAMN
K20 series: LTDN48K20DAM
Ver 1.0
Hisense Electric Co.，Ltd.
December 20, 2013
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Contents
Contents ..................................................................................................................................................................................... - 2 -
Service Manual ......................................................................................................................................................................... - 3 -
1. Precautions and notices ................................................................................................................................................... - 3 -
1.1 W arning ................................................................................................................................................................. - 4 -
1.2 Notes ..................................................................................................................................................................... - 7 -
2. Product Specifications .................................................................................................................................................. - 10 -
2.1 Main board layout ............................................................................................................................................... - 10 -
2.2 MSD6308 includes product ................................................................................................................................ - 13 -
3. Factory/Service OSD Menu and Adjustment ................................................................................................................ - 13 -
3.1 How to enter the Factory OSD Menu .............................................................................................................. - 13 -
3.2 Factory OSD Menu ............................................................................................................................................. - 14 -
4. Software updating ......................................................................................................................................................... - 17 -
4.1 Write boot software to nand flash ....................................................................................................................... - 17 -
.4.2 Upgrading main software with Tftpd32、securecrt .......................................................................................... - 20 -
4.3 Upgrading with the USB disk ............................................................................................................................. - 23 -
5.Troubleshooting ............................................................................................................................................................. - 25 -
6. Circuit instruction ......................................................................................................................................................... - 31 -
6.1 Power assign and block diagram ........................................................................................................................ - 31 -
6.2 Main board signal process .................................................................................................................................. - 31 -
7. Schematic circuit diagram ............................................................................................................................................ - 33 -
8. Explode View ................................................................................................................................................................ - 33 -
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Service Manual
1. Precautions and notices
BEFORE SERVICING THE LCD TV, READ THE SAFETY PRECAUTIONS IN THIS
MANUAL.
WHEN REPLACEMENT PARTS ARE REQUIRED, BE SURE TO USE REPLACEMENT
PARTS SPECIFIED BY THE MANUFACTURER.
Proper service and repair is important to the safe, reliable operation of all Hisense Electric Co.,
Ltd Equipment. The service procedures recommended by Hisense and described in this Service
Guide are effective methods of performing service operations. Some of service
operations require the use of tools specially designed for the purpose. The special tools
should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which
should be carefully read in order to minimize the risk of personal injury to service personnel.
The possibility exists that improper service methods may damage the equipment. It is also
important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE.
Hisense could not possibly know, evaluate and advise the service trade of all conceivable ways
in which service might be done or of the possible hazardous consequences of each way.
Consequently, Hisense has not undertaken any such broad evaluation. Accordingly, a
serviceman that uses a service procedure or tools, which are not recommended by Hisense,
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must first satisfy himself thoroughly that neither his safety nor the safe of the equipment
will be jeopardized by the service method selected.
Hereafter throughout this manual, Hisense Electric Co., Ltd will be referred to as Hisense.
1.1 W arning
1.1.1
Critical components having special safety characteristics are identified with a
by the Ref.
No. in the parts list. Use of substitute replacement parts, which do not have the same specified
safety characteristics, may create shock, fire, or other hazards.
Under no circumstances should the original design be modified or altered without written
permission from Hisense. Hisense assumes no liability, express or implied, arising out of any
unauthorized modification of design. Serviceman assumes all liability.
1.1.2.
All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD).
Careless handling during repair can reduce life drastically. When repairing, make sure that you
are connected with the same potential as the mass of the set by a wristband with resistance.
Keep components and tools also at this same potential.
DANGER CAUTION
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY
ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH
THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE GUIDE.
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1. Never replace modules or other components while the unit is switched on.
2. When making settings, use plastic rather than metal tools. This will prevent any short
circuits and the danger of a circuit becoming unstable.
1.1.3
To prevent electrical shock, do not use this polarized ac plug with an extension cord, receptacle,
or the outlet unless the blades can be fully inserted to prevent blade exposure.
To prevent electrical shock, match wide blade or plug to wide slot, fully insert.
1.1.4
When replacement parts are required, be sure to use replacement parts specified by the
manufacturer or have the same characteristics as the original part. Unauthorized substitutions
may result in fire, electric shock, or other hazards.
1.1.5
Safety regulations require that after a repair the set must be returned in its original condition. In
particular attention should be paid to the following points.
-Note: The wire trees should be routed correctly and fixed with the mounted cable clamps.
-The insulation of the mains lead should be checked for external damage.
1.1.6
(1) Do not touch Signal and Power Connector while this product operates. Do not touch EMI
ground part and Heat Sink of Film Filter.
(2) Do not supply a voltage higher than that specified to this product. This may damage the
product and may cause a fire.
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(3) Do not use this product in locations where the humidity is extremely high, where it may
be splashed with water, or where flammable materials surround it. Do not install or use the
product in a location that does no satisfy the specified environmental conditions. This may
damage the product and may cause a fire.
(4) If a foreign substance (such as water, metal, or liquid) gets inside the panel module,
immediately turn off the power. Continuing to use the product may cause fire or electric
shock.
(5) If the product emits smoke, and abnormal smell, or makes an abnormal sound,
immediately turn off the power. Continuing to use the product, it may cause fire or electric
shock.
(6) Do not disconnect or connect the connector while power to the product is on. It takes
some time for the voltage to drop to a sufficiently low level after the power has been turned
off. Confirm that the voltage has dropped to a safe level before disconnecting or connecting
the connector.
(7) Do not pull out or insert the power cable from/to an outlet with wet hands. It may cause
electric shock.
(8) Do not damage or modify the power cable. It may cause fire or electric shock.
(9) If the power cable is damaged, or if the connector is loose, do not use the product:
otherwise, this can lead to fire or electric shock.
(10) If the power connector or the connector of the power cable becomes dirty or dusty, wipe
it with a dry cloth. Otherwise, this can lead to fire.
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(11) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or
sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
1.2 Notes
Notes on Safe Handling of the LCD panel and during service
The work procedures shown with the Note indication are important for ensuring the safety of
the product and the servicing work. Be sure to follow these instructions.
• Before starting the work, secure a sufficient working space.
• At all times other than when adjusting and checking the product, be sure to turn OFF the
POWER Button and disconnect the power cable from the power source of the TV during
servicing.
• To prevent electric shock and breakage of PC board, start the servicing work at least 30
seconds after the main power has been turned off. Especially when installing and removing the
power board, start servicing at least 2 minutes after the main power has been turned off.
• While the main power is on, do not touch any parts or circuits other than the ones specified. If
any connection other than the one specified is made between the measuring equipment and the
high voltage power supply block, it can result in electric shock or activation of the
leakage-detection circuit breaker.
• When installing the LCD module in, and removing it from the packing carton, be sure to have
at least two persons perform the work.
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• When the surface of the panel comes into contact with the cushioning materials, be sure to
confirm that there is no foreign matter on top of the cushioning materials before the surface of
the panel comes into contact with the cushioning materials. Failure to observe this precaution
may result in, the surface of the panel being scratched by foreign matter.
• When handling the circuit board, be sure to remove static electricity from your body before
handling the circuit board.
• Be sure to handle the circuit board by holding the large parts as the heat sink or transformer.
Failure to observe this precaution may result in the occurrence of an abnormality in the soldere
d
areas.
• Do not stack the circuit boards. Failure to observe this precaution may result in problems
resulting from scratches on the parts, the deformation of parts, and short-circuits due to residual
electric charge.
• Routing of the wires and fixing them in position must be done in accordance with the original
routing and fixing configuration when servicing is completed. All the wires are routed far away
from the areas that become hot (such as the heat sink). These wires are fixed in position with
the wire clamps so that the wires do not move, thereby ensuring that they are not damaged and
their materials do not deteriorate over long periods of time. Therefore, route the cables and fix
the cables to the original position and states using the wire clamps.
• Perform a safety check when servicing is completed. Verify that the peripherals of the
serviced points have not undergone any deterioration during servicing. Also verify that the
screws, parts and cables removed for servicing purposes have all been returned to their proper
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locations in accordance with the original setup.
The lightning flash with arrowhead symbol, within an equilateral triangle is
intended to alert the user to the presence of uninsulated dangerous voltage within
the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock.
The exclamation point within an equilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the set.
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2. Product Specifications
2.1 Main board layout
2.1.1 1Main board: 5645
Take LHD32K160NAMN 、LTDN48K20DAM main board（5645）for example:
Top:
USB
HDMI VGA
HDMI
HDT V INPUT
Tuner
MSD6308
Flash
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Bottom:
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2.1.2 Main board: 5650
Take LHD24N10NAM、LHD32N10NAM 、main board（5650）for example:
Top:
Bottom:
RSAG7.820.5650
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2.2 MSD6308 includes product
Model Panel Mode LVDS(Main-Panel)
Main board Power board
LHD24N10NAM V236BJ1-LE2
1、HX2-2×20KLB400-BOE\ROH 2、
FFC-12-850\ROH
RSAG7.820.5650 RSAG7.820.5258
LHD32N10NAM HE315GH-E77
HX2-2×20KLB400-BOE\ROH RSAG7.820.5650 RSAG7.820.5268
LHD32K160NAMN
HE315GH-E77\ROH HX2-2X15KLB400P-CMO-3\ROH RSAG7.820.5645 RSAG7.820.5023
LTDN48K20DAM
HD480DF-B37
HX2-2x22KLB500P-HS-6\ROH
RSAG7.820.5645 RSAG7.820.5482
3. Factory/Service OSD Menu and Adjustment
3.1 How to enter the Factory OSD Menu
With user’s RC
Power on the TV.
1. Press “Menu” button and call up User OSD Menu.
2. Select “ Sound” -> “Balance” item.
3. Press number key 1->9->6 ->9 in sequence when “Balance” item is focused.
Note: If necessary, re-do number keys.
4. Factory OSD appears.
Note: Press “exit” key on the RC, which can exit factory OSD menu.
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3.2 Factory OSD Menu
The Factory OSD Menu comprises Factory Menu and Design menu.
3.2.1、Factory Menu
White balance:
Option:
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Init:
Version:
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